TinyHouseBuild.comI ran across this one while researching something else. Lots of great information about building a tiny house, a 7 day E-Course, Videos, plans, etc.

Tiny House DesignThis site is pretty interesting. In addition to having plans, there are stencils so you can draw your own design and even 3-D printed models. I think you can even design your own model of a tiny house and have it created with a 3-D printer.